331 
All the material which is available for study and identifica- 
tion consists of leaves and pods, and the medium in which they 
are preserved is so coarse that much of the finer nervation and 
dentation is obliterated. Nevertheless, the specimens in general 
are very satisfactory, and from them the following species and 
genera have been identified: 
_ Magnolia acuminata, L: 
Magnolia glauca, L. 
Asimina triloba, (L.), Don. 
llex opaca, Ait. 
llex Cassine, L. 
Amelanchier Canadensis, (L.), Medic., var. rotundifolia (Mx.) 
T. & G. 
Ligquidambar Styracifiua, L. This is represented exclusively 
by a three-lobed variety. It so closely resembles L. Europea, 
Al. Br., that I was at first inclined to refer it to that species, 
but as we have in Mexico a variety of L. Styracifiua with 
three lobes, there seems to be no reason why they should not be 
considered identical. The significant fact has also been pointed 
out to me by Dr. N. L. Britton, that young shoots of Z. 
Styraciflua often bear three-lobed leaves, thus indicating that the 
ancestors of our five and seven-lobed species were represented 
by forms such as those from Bridgeton. If it should be proven 
that the Mexican variety is worthy of specific rank, then the 
Bridgeton fossil form should be renamed in conformity with it. 
Nyssa uniflora, Walt. A number of irregularly and coarsely- 
toothed or entire leaves, which were at first mistaken for some 
Species of Quercus, are evidently to be referred to this Species. 
They appear to show even greater diversity in outline than the 
living species. 
Nyssa Caroliniana, Poir. 
Viburnum Bridgetonense, Britton. One of the most abun- 
dant Species represented, and one of the first to attract attention. 
Dr. Britton was the earliest to note its generic relationship with 
. Viburnum, and to propose for it the name which is here adopted. 
_ Allarge number of forms are included under this name, and it is 
Probable that several new species, or even genera, might be sepa- 
tated from it. Some indicate relationship to Vitzs, others to 
Populus, and further comparisons will have to be made before 
